git: 122b2a3530f8 - main - getsockopt.2: Add SO_SPLICE source socket read and socket close behavior

The branch main has been updated by kbowling:

URL: https://cgit.FreeBSD.org/src/commit/?id=122b2a3530f8baab56d196b51724cc3ddd38abd2

commit 122b2a3530f8baab56d196b51724cc3ddd38abd2
Author:     Kevin Bowling <kbowling@FreeBSD.org>
AuthorDate: 2025-07-26 21:18:47 +0000
Commit:     Kevin Bowling <kbowling@FreeBSD.org>
CommitDate: 2025-07-26 21:18:47 +0000

    getsockopt.2: Add SO_SPLICE source socket read and socket close behavior
    
    Add select(2), poll(2), or kqueue(2) source socket semantics and close
    behavior.
    
    Reported by:    Udip Pant <upant@netflix.com>
    Reviewed by:    manpages (ziaee), markj
    Obtained from:  OpenBSD
    MFC after:      3 days
    Sponsored by:   Netflix
    Differential Revision:  https://reviews.freebsd.org/D51547
---
 lib/libsys/getsockopt.2 | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lib/libsys/getsockopt.2 b/lib/libsys/getsockopt.2
index 8839b61597a2..3867824681d7 100644
--- a/lib/libsys/getsockopt.2
+++ b/lib/libsys/getsockopt.2
@@ -593,6 +593,15 @@ specified amount of time has elapsed since the initial call to
 If
 .Fa sp_fd
 is -1, the socket will be unspliced immediately.
+A successful
+.Xr select 2 ,
+.Xr poll 2 ,
+or
+.Xr kqueue 2
+operation testing the ability to read from the source socket indicates
+that the splicing has terminated and at least one byte is available for
+reading.
+When one of the sockets gets closed, splicing ends.
 .Pp
 When passed to
 .Fn getsockopt ,